Which one of the following cyano complexes would exhibit the lowest value of paramagnetic behaviour? (At. No…

Which one of the following cyano complexes would exhibit the lowest value of paramagnetic behaviour? (At. No. $\mathrm{Cr}=24, \mathrm{Mn}=25, \mathrm{Fe}=26, \mathrm{Co}=27$ )
  1. $\left[\mathrm{Cr}(\mathrm{CN})_6\right]^{-3}$
  2. $\left[\mathrm{Mn}(\mathrm{CN})_6\right]^{-3}$
  3. $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{-3}$
  4. $\left[\mathrm{Co}(\mathrm{CN})_6\right]^{-3}$

Solution

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Asked in: JEE Main 2005

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